<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div id="box">
        HELLO WORLD
    </div>
</body>
</html>
<script src="js/jquery-1.10.1.js"></script>
<script>
   //等待页面所有元素加载完毕再执行   单行注释
   //ctrl + /  单行注释
   //ctrl + shift + /   多行注释
    /*$(function () {
        $("#box").click(function () {
            $(this).css("color","yellow");
        })
    })*/
</script>